Thanks for the reply. I can program my custom PCB from the nrf52 but I can't program the on-board nrf52832. It is always looking for Jlink to an external board. What tells the programmer to use on-board nrf52832 and the buttons?

[Reni]

Thanks for the reply. I can program my custom PCB from the nrf52 but I can't program the on-board nrf52832. It is always looking for Jlink to an external board. What tells the programmer to use on-board nrf52832 and the buttons?

[Simonr]

Hi

Please try reinstalling the Interface MCU firmware. It can be downloaded here, and you can see how to reinstall/update it properly on this page in the Infocenter.

Best regards,

Simon